Dear All, Tahnks to all you guys for immediate reply by the way i jus hav modified the firewall by explicitly specifiying a rule to block ssh traffic from outside i will wait for sometime and check the log again thnaks again guys apprecite your replies Regards Fabian > 2009/6/19 Cisco-Education <fabian@xxxxxxxxxxxxxx>: >> Dear All, >> >> I have the following setup running perfectly OK for a long time >> >> CentOS release 5 (Final) >> sendmail-8.13.8-2.el5 >> MailScanner 4.76.25 >> bind-9.3.4-6.0.3.P1.el5_2 >> >> now i jus setup a centos box running BackupPC for backing up my my above >> mail server using ssh as per the instructions in backup pc site >> i had to enable sshd so i did it and >> everthing works perfect and backup works great as per my requirement >> >> but i notice that when i do a >> >> tail -f /var/log/secure >> >> i see the followin very often >> --------------------------- >> Jun 19 16:26:06 kmdns1 sshd[11073]: Invalid user jeka from 87.118.122.78 >> Jun 19 16:26:06 kmdns1 sshd[11074]: input_userauth_request: invalid user >> jeka >> Jun 19 16:26:06 kmdns1 sshd[11074]: Received disconnect from >> 87.118.122.78: 11: Bye Bye > >> Now both the Mail server and the backup pc server behind firewall and >> ssh >> protocol is denied to the hosts in the DMZ zone >> >> jus wondering how a outside user could try to ssh to my mail server. >> if i stop the sshd daemon i dont see any messages in my secure log file >> >> apprecite your addvice and help >> >> >> regards >> >> Fabian >> >> >> > > Most likely answer -- your FW is not actually blocking ssh connections > to the servers from outside the DMZ. The source of the traffic is a > routable address, if it doesn't match your ip space then your FW isn't > working correctly. > > Brian > _______________________________________________ > CentOS mailing list > CentOS@xxxxxxxxxx > http://lists.centos.org/mailman/listinfo/centos > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
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